Some of these are very old and/or not very robust; marked with ``hmm''.
calendar.py - Calendar printing functions
ConfigParser.py - Parse a file of sectioned configuration parameters
cmp.py - Efficiently compare files
cmpcache.py - Efficiently compare files (uses statcache)
dircache.py - like os.listdir, but caches results
dircmp.py - class to build directory diff tools on
linecache.py - Cache lines from files (used by pdb)
pipes.py - Conversion pipeline templates (hmm)
popen2.py - improved popen, can read AND write simultaneously
statcache.py - Maintain a cache of file stats
colorsys.py - Conversion between RGB and other color systems
dbhash.py - (g)dbm-like wrapper for bsdhash.hashopen
mhlib.py - MH interface
pty.py - Pseudo terminal utilities
tty.py - Terminal utilities
cmd.py - build line-oriented command interpreters (used by pdb)
bdb.py - A generic Python debugger base class (used by pdb)
ihooks.py - Import hook support (for ni and rexec)